Özet:

The aim of this study is to investigate the clinical and hematological findings and the presence of Escherichia coli (E.coli) and E.coli O157:H7 serotype in calves with diarrhea in Van and its region. In the present study a total of 74 calves aged between 1 and 30 days in different breeds were tested. Out of 74 calves, 54 were diarrheic and 20 were healthy. Escherichia coli (E. coli) O157:H7 serotype together with some hametological parameters (Red blood cell (RBC), White blood cell (WBC), Hemoglobin (Hb), Packed cell volüme (PCV)) were investigated in the faeces of these diarrheic and healthy calves. According to examination and evaluation protocol, out of 54 diarrheic calves, 20 had a mild dehydration, 20 had medium dehydration and 14 had severe dehydration. Haematolojic parameters in calves with mild dehydration were not significantly different compared to the values obtained from control animals. However, PCV and Hb values were found to be significantly different (p<0.001) in calves with medium and severe dehydration. RBC in calves with medium (p<0.01) and severe (p<0.001) dehidration were also significant compared to control values obtained from healthy calves. Furthermore, the number of WBC were significantly (p<0.05) different both in calves with medium and severe dehydration. Although E.coli determined 74,6% in the diarrhoeic calves after microbiological analysis, E.coli O157:H7 serotype couldn’t be isolated. As a result, important changes in RBC, WBC, PCV and Hb values obseved in calves with diarrhea and E.coli was one of the most important causative agent calf diarrhea. It was also determined that E.coli O157:H7 serotype isn’t a pathogen seen very often.

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